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A UNITED STATES PATENT OEIIICEO GUsTAvUs II. zsoIIEcH, oE INnIANAroLIs,INDIANA'.y

BELT-TIGHTEN ER.

SPECIFICATION forming part of Letters Patent No. 284,705?,datedSeptember 11, 1.883,

` Application inea March 2, 1883. (No model.)

A To all whom it may concern:

the same as the angular motion of the arm H.

Uy present improvement provides, the same range of motion for thetemporary changes of position of the parts due to vibration in working,but provides an additional adjustment not contained in the previousmachine. By this additional adjustment the angular position of the armsE and H Inay be changedI at will within considerable limits withoutinterfering with the temporary changes of position of the whole as themachinery is worked. I

The accompanying drawings form a part of this specification, andrepresent what I consider the best Ineans of carrying out the invention.

Figure 1 is a general side elevation, showing the entire mechanism. Fig.2 represents a portionon a larger scale.

Similar letters of reference indicate like parts in both-the gures.

G is the bifurcated frame, rocking freely on the shaft g as a center,and carrying the tightening-pulley D, in the manner and with theadvantages set forth in my said previous patent. All the parts nototherwise described Inay be exactly as described in the said previouspatent of December 19, 1882.

H H2 is a bell-crank lever, made in two distinct parts. The part H isfirmly and rigidly attached to the part H2, but with provision foradjustment, so as to conveniently vary the angle of these partsrelatively to each other. The part H2 is formed with an open jaw orsocket, h2, containing a transverse pin, H. The arm H stands in thesocket h?, and turns on the pivot P therein.

W is a screw tapped through the upper porthe angle of the parts H2 andH', so that a given elevation of the arm H will press thetightening-pulley D so as to deflect the belt C to a greater extent thanbefore, it is required simply to slacken the lower screw, 2, and totighten the screw W. This will change the position of the parts and setthem fast in the new position. to the action of the spring J may be thesame as before, and the machinery will work in all respects with thesame effect as before, but instead of being adapted only to a verymoderate range of variation of tightness of the Abelt C, I can by thisimprovement adapt the device to a very wide range.

When the belt is new the screw NV will be inserted but a little ways,and the screw XV? will be set'inward nearly or quite to its full extent.As a consequence, the arm H will lie in the upper portionof the jaw h2.Then the belt is very loose the screw XV? must be let back and the screwXV inserted nearly or quite to its full extent. Thus the arm H Inay beshifted from the extreme upper to the extreme lower portion of the jawh2, turning on its pivot H, and being rmly held in any position by thescrews W W2.

Modiiicati ons may be made in the forms and proportions of the details.An open jaw may, as intimated, be substituted for the socket h?.

I. claim as my invention- The belt-tightener described, having the arm Hand adjustment V WV, in `combination with the spring J, and with theframe G and suitable connections to the tightening-pulley D, as hereinspecied. t

In testimony whereof I have hereunto set my hand, at Indianapolis, this18th day of January, 1883, in the presence of two subscribing witnesses.

GUSTAVUS H. ZSCHECH. Witnesses:

PETER SPITZEADEN, THEoDoRE REYER.

y The range of motion due p

